Design Journal Entry - Module 7

Journal Entry For
Module 7 - Building Envelope Systems

PART 1: DESIGN OF BUILDING FACADE

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The revised model with facades

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South Facade

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North Facade

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West Facade

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East facade

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Detail of North-South Vertical Shading Devices

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Effectiveness to create a shadow on the external corridor of the shading devices

Material specification:

  • Accessible Rooftop floor:

Total thickness 400mm

Resistance R: 0.263 m2.k/W

Thermal mass 321.68 kJ/(m2.K)

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  • Basic drywall (use for partitions)

Thickness: 110mm

Resistance R: 0.1538 m2.K/W

Thermal mass: 92.40 jK/m2.K

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  • Double glazing glass:

Thickness 90mm

Resistance R: 2.036 m2.K/W

Thermal mass 83.39 kJ/m2.K

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  • Retention Cast-in-situ retention wall

Thickness: 500mm

Resistance: 0.4780 m2.K/W

Thermal mass: 755.55 kJ/(m2.K)

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  • Solar path Study:
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  • Location of shading devices:
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PART 2: ENERGY MODEL

Submit this Energy Model to the Insight analysis and adjust with these options

- Operating schedule factor: BIM value

- Building orientation: 0 North

- Southern Wall: 50% shading

- Northern Wall: 50%

- Eastern Wall: 90%

- Western Wall: 90%

- Glazing facade: Double Low-e glass for NWES facades

- Light efficiency: 0.3 W/ sf

- Daylighting and occupancy control

- Plug-load: 0.6 W / sf

- Choice of highest panel efficiency, with 60% roof coverage and 30 years of payback time

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Benchmark got 21.5 kBtu/ ft2/yr, barely meeting the ARCH2030 (17.7) and lower than ASHRAE (102.4)

PART 3: DAYLIGHT ANALYSIS

Option 1: I just made a test for Level 1, The rendered illumination map is applied to the floorplan model. I chose the gradient style as Ecotect style. (I love this style since I have been using Autodesk Ecotect for a while and now it can be incorporated into the latest version of Revit)

It is interesting to see that the gallery with a transparent storefront has a gradient distribution of illumination from the South to the North and we can check to add or remove the shading devices for the optimized design.

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Option 2: Use the Revit Cloud Render tool to produce Illuminance Renderings of three key areas in your building model.

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I used Autodesk Cloud Rendering to render 3 interior views, using Summer solstice June 21, which is considered a hot day in Singapore to check the effectiveness of the shading devices

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Referring to this requirement of illumination in interior spaces:

  • Store environment: 5 fc
  • Residential space (living): 5-40 fc
  • Residential space (working): 70-90 fc
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Proposal: To add more shading decides for the cafe space to reduce the illumination. The open office and indoor exhibition space have a good illumination